Mass-transfer studies of solid-base catalyst-aided CO2 absorption and solid-acid catalyst-aided CO2 desorption for CO2 capture in a pilot plant using aqueous solutions of MEA and blends of MEA-MDEA and BEA-AMP. Issue 4 (17th August 2019)

• Record Type: Journal Article
• Authors: Coker, James; Afari, Daniel Boafo; Narku-Tetteh, Jessica; Idem, Raphael
• Is Part Of: Clean energy. Volume 3:Issue 4(2019)
• Page Start: 263
• Page End: 277
• Publication Date: 2019-08-17
• Subjects: HZSM-5 -- K/MgO catalyst -- CO2 removal efficiency -- CO2 capture -- mass-transfer coefficients of absorber (KGaV) and desorber (KLaV); Clean energy -- Periodicals; Energy industries -- Periodicals; Renewable energy sources -- Periodicals; Carbon dioxide mitigation -- Periodicals; Green technology -- Periodicals; Carbon dioxide mitigation; Clean energy; Energy industries; Green technology; Renewable energy sources; Electronic journals; Periodicals
• DOI: 10.1093/ce/zkz015
• Languages: English
• ISSNs: 2515-396X

Abstract

Abstract: Mass-transfer studies of catalyst-aided CO2 absorption and desorption were performed in a full-cycle, bench-scale pilot plant to improve CO2 absorption using 5M MEA, 5M MEA-2M MDEA and 2M BEA-2M AMP. A solid-base catalyst, K/MgO, and an acid catalyst, HZSM-5, were used to facilitate absorption and desorption, respectively. Absorption and desorption mass-transfer performance was presented in terms of the overall mass-transfer coefficient of the gas side (KG av ) and liquid side (KL av ), respectively. For non-catalytic runs, the highest KG aV and KL aV were 0.086 K m o l m 3 . k P a . h r and 0.785 1 h r for 2M BEA-2M AMP solvent. The results showed 38.7% KG av and 23.6% KL av increase for 2M BEA-2M AMP with only HZSM-5 catalyst in desorber and a 95% KG aV and 45% KL aV increase for both K/MgO catalyst and HZSM-5 catalyst. This was attributed to the role of K/MgO in bonding loosely with CO2 and making it available for the amine reaction.